Air-brake system.



F. H. DUKESMITH.

AIR BRAKE SYSTEM.

Y APPLICATION IILED ma.2e.19|1. I 1 ,278, 3 1 7 Patented Sept. 10, 1918;

' SHEETSSHEEY I:

F. H. DUKESMITH. AIR BRAKE SYSTEM. APPLICATION mp0 mmza. my.

ATTORNEYS UNITED STATES PATENT OFFICE.

FRANK H. DUKESMITH. OF MEADVILLE. PENNSYLVANIA. ASSIGNOR T0 RELIANCE AIR BRAKE COMPANY, INC. OF BUFFALO, N. Y., A CORPORATION OF NEW YORK.

AIR-BRAKE SY STEM.

Application filed March 28. 1917.

'1 0 all Ir/1 0m it may concern:

lie it known that I, FRANK H. .DUKE- snrrina citizen of the United States. residing at ll'l eadville. in the county of Crawford aml State oi Pennsylvania, have in ented Speeifieationof Letters Patent.

new and useful Improvements in Air-Brake I Systems, of which the following; is a specitieation.

My invention relates to air brake systems, particularly in connection with brakes on locomotives and other wit-propelled vehieles.

I have planned to improve thepresent method of controlling said brakes and especially to simplify the-meclninism en'iployed in the operation.of-said brakes, and to do so my object has been to provide an independentair brake system for locomotives that will do its work with as few parts as possible and will still be in harmony with the standard practices now em] )loyed in the air brake art.

The purpose of my airbrake system is to provide means that will afford alternate control of the locomotive and train brakes, and to give. in addition, a means whereby the brakes onxthe loeom tive may be. released either at the usual rate of exhaust employed in the regular automatic release of the brakes or very quickly. (as is done by my air brake system as shown in my Patent: No. 1,0(H,224. dated June 10. 1913) and to do so without having to employ a cylinder exhaust valve andan auxiliary stop valve, as used in m v air brake system just referred to. x

To attain these objects I employ (aside from the r "ial air compressor and main reservoir) merely a: standard engineefs aut oniati ir bralge ,\-',,alve "n"plain triple valve an ahxiliiiifv rif'ea'envoir. a brake cylinder, my improvedindependent brake valve and suit-- ablepiping rollneetions to rorrelate these parts, together with an ordinary reducing valvea'nd my improved nniintainin'e valve. device for the pl'u'pose of overcoming brake cylinder leakage. lfhave thus avoided the 'useot' what. is commonly known as a dis- Q tributiug valve. or the use of a retaining valve. an auxiliary stop valve and a cylinder exhaust valve as is employed in my air brake'syst'em p'aiiuled on June 10. 1913. lurthermore. by employing the well known (l-fi typeot engineens automatic brake valve, '1' have avoided the necessity of having to provide a ncwtype of engineers automatio Patented 5 #pt. 10, 1918.

Seria1N0.158.105.

brake valve in order to have my independent brakevalve do its work oi independently controlling the locomotive brakes.

.Tn the accompanying drawings:

Figure 1 a diagran'miatie view showing the different elements of my improved air brake system shown in their operative relation. Fig. 2 is a sei'itional elevation, on an enlarged scale of the maintaining valve which may form a part of my improved system. Fig. 3 is a verti al section, on an enlarged scale of the imlependent brake valve, showing the form in which the same may be embodied for acemnplishing the purposes of my invention. Fig. 1 is a top plan view of the valve seat which cooperates with the nmvable member of the mam'lally operated controlling valve which controls the How of air from the main reservoir to the brake cylinders. from the brake cylinders to the atmosphere or retains the pressure within the pipe connections of thesystcm. Fig. 5 is a. top plan view of the movable valve member which cooperates with the valve seat shown in Fig. 4. Fig. (i is a horizontal section taken on line (l(' Fig. 3. showing the rotatable manually controlled valve-inen'iber when the imlepeude'nt brake valve is in the application position. Figs. 7, S and 9 are sectional views similar to Fig. (5 showing the rotary member of the independent brake valve in the lap, running and quick release positions, respectively. Fig. 10 is a'horizontal section taken on the correspondingly numbered line in Fig. 11. Fig. 11 is a fragmentary vertical section taken on line 11-11, Fig. 10. Fig. 12 is a horizontal section taken on line 12-12, Fig, 13. Fig. 13 isa fragmentary vertical section. taken on line iii--13. Fig. 12. Figs. 1-! and,l5 are fragmentary vertical sections of the triple valve 12 showing the valve mechanism and its ope -a ting piston and slidewalve in different positions. I

Similar eha actors of reference indicate corresponding parts throughout the several news.

In its generalorganization this air brake system comprises a pump 1 which is mounted on the loeomotive and supplies etmipressed air. This pump may be of any suitable con struetiou and is merelyindicated diagrammatically in Fig. 1. This pump delivers compressed air into a main reservoir 2 and from the latter theair delivered by means of a pipe '3 which may be provided with a cut-out cock 27 whereby the main reservoir may be cut oil from the rest of the piping, if desired. 18 represe ts diagrammatically the usual. engineers automatic brake valve which is connected by pipe-11) with the pipe 3 beyond the cut-off cock 27 and also by pipe 17, containing a cut out cock 31, with the train line pipe 17 leading to the brake mechanism of the cars which may be coupled with the locomotive. 22 represents the usual equalizing reservoir which is connected with the engineer's automatic brake valve. 210 is the usual duplex gagewhich shows the pressures usually carried in the main reservoir and in the train pi )e on the locomotive and which is eonneete by a pipe 19 with the main reservoir pipe 3 and hy-pipe 21 to the equalizingre'servoir 19 is a pipe leading to the governor of the pump 1. 12 represents as a whole the usual plain triple valve commonly used on locomotives which is connected by a pipelt with the auxiliary' reservoir 15 and also by a pipe 16 containing a cut-out cock with the. train line pipe 17. 7 represents the usual brake cylinder arranged on the tender of a locomotive and 8, 8 two brake cylinders which are usually mounted on each side of the engine. 5 represents the air supply pipes leading, to the brake cylinders S. 8 and 6 the supply pipe leading-to the tender hra ke cylinder. which pipes are connected with each other andprovided with a safety valve 103 where by the pressure of the air may he tHlilO'llldlh ca lly; blown off when the same exceeds a n'iined pressure. If desired the pipe n t-o the tender hrake cylinder 7 may be provilled with a cut-out cock '29 of the The usuaLa-n'd well know-n construction. piping 5 and 6 may .also be connected to a branch pipe 9 with. a pressi'lre gage 10 for the. purpose of showing whatever pressure may be in the brake cylinders. on the engine and tender. 23 represents a pressure main taining valve which is constructed in accordance with my invention and which may be employed in connection with this system.

As shown,- the same is connected by means of a pipe 24 with-the outlet pipe 3 of the inain reservoir, and also. by ,a' pipe 26 with the brake :c v1iuderfpipi-ng orconditits.

represents gem-any the i't-itlependent" brake valve wh ch embodies some features of' m v invention and which is connected by a pipe 25- with the maintaining valve 23. also 5 and 6 witlrthc brake cylimlers by pi.

on, theen' i'ne and tender. also by. pipes ll and 13. willi the triple valve. also lav a part of pipe;- withth'e pipe-fill; leading-tothe maintaining valve-and.alsowith-the pipe of the main reservoir.

102 represents a re- (liming valve ofusualjconstrtuitlon. which is eonneetedfavltli.the plpe 8 between the man;

I reservoiand't-he independent lnakevalve 4.

In its general organizat on the triplevalve shown in Figs. 14 and i5 comprises a piston 2,01 arranged between the trainli'ne chamber 200 and the auxiliary reservoir chamber 202 of the triple valve casing 12 and provided with a stem 203 to which is attached a slidevalve 204 having a cavity 209 which to operates with ports 207 and 208 arranged in the seat and connected respectively by pipes 11 and 13 with the independent brake valve. The slide valve 204 is also'prov'id'ed'75 wlth a port 206 which is adapted to cooperate with the port 207 to permit auxiliary reservoir pressure which is always in cham-v ber 202 topass into the pipe 11 when they brakes are being'ap 'rlied automatically. The 80. pipe 14 connects the chamber 202 with. the auxiliary reservoir in the usual manner.

Although the pressure maintaining i'al've 23 may be variously constructed and still accomplish the purposes ofthis invention. 85. the same preferably comprises a casing hav-. ing lower and upper sections 32. 34 between which is arranged a movablediiaphi-agm. 42 carrying a stem 23 and dividing, the inte- T10! of the easing into an upper' chamber -14 having an opening 50 which receives the pipe 25 and a. lower chamber 431 having. an opening 45 which receives the pipe 26; lower section 32 of this casing is also-pro vided with a passage 35which has its inlet. end 36 connected by pipe 24* withthe main reservtnr pipe 3 and it is a'lso-connect'ed'fhy a port 37 with the lower chamber 4.3. The lower end'of the port 37 for-ms a v l ve 's 1 I 39 which is adapted tohe engaged b a st ply check val've3-8 which is held .y-i'e'ldh i in its closed position by air pressure' in t e passage 35 and by a spring 40 hearing. at its lower endon a' plug 41 arrangedin an open-- ing in the lower side of the lower casing" section 32'. The stem 23 isprovitled with an axial port. or passage 4-6cm1tai-ning a valve seat 47 which is adapted to be engaged by a controlling check valve 48 held yield ingly against its seatby a -springli49' a'iialthe-=1 101 in the upper section aml havingan inlet-53 whichconnectsnfiith'tlupipe: 3 leading to the main reservoir. a flat valve seat-58* ranged on the-top ot' the lowercaesiumsec tion 51 and fat-in" the eh'amlwr 54, a main. 1 exhaust outlet-7(3- arrmnzed-axial-lyi in thek. lower casingswtitm and opelriatg at it-s u lrlier end through the valve seatjm while" its lower end opens to-the:atna s -)liere."pref- 1'25 erahly tlnrougl-i au-exhaust-ni-pple w -t. "'ll lower casing section 51 is also 'prmidctl in- I its lower part with .a chamlau" 78 tl'ieinite'r' end 'of. which is closed by a tilugrifiti. the

uppem-side thereof.ibeingzyprovided with a 3o" passage or porl Tl leadingto the valve seal. 58 and its inner end opening into the main exhaust. channel 70.

The lower casing setion 5] also contains a ehamber 100 the outer side ol which is closed by a plug 85. its lower side is conneeted with the pipe 5. its upper side eon:- nmnieates by means of a passage H!) with a cored passage UH with two ports on and HT which open into the valve seat. 43$ on practically diametrieally opposite sides of the center of this seat; and its inner side 3onneets by means of a port Ht) with the main exhaust channel or outlet 76. as best shown .in Figs. hand 11. Within the chamber TS is arranged a reriprm'ating piston T eontaini-ng a" small vent. port 87. extending through the Stllll h. 8 represents an automatie release valve arranged in them-hamber Hi and adapted to ngage a seat. 1 around the port St and operated by eminenting the same with the stem o l' the piston 79, also by air pressure in the ehaniber .lt)tl and also by a spring H 3 arranged between this valve and the plug 85. The. lower easing section 51. also eontains a passage 72 whieh ronneets atits lower end with the pipe 11 while its upperend eonneets with two ports T1 and T3 which (ipenthrongh the valve seat 5h on one side of its renter but at ditl'erent points rirenmlerentially and also at ditl'erenl' radial distanees relatively thereto.

In the laee ol' the seat n there is a groove 77 extending radially outward from the main exhaust ehannel 7t). ()pening through the valve seat 58 is a port 75 whieh eonneets at its lower end with the pipe l t. Another port 70 is arranged in the lower easing seetion i and opens at its upper end through the valve seat 58 while its lower end eonnerts with the pipe. 2.3.

Extending through both easing sections 51. is a passage 53 whieh opens at its upper end into the ehamber '54 while its lower end eonneets with the pipe 3.

Within the eha'mbe 54 is a rotatable valve preferably of disk form, wlneh rests with 55') its seat :38 and i. ada 'itei l to rotate relatively thereto for bringing ditl'erent ports. as-

' s or eavities in vthis valve in litl'erent sa 0] ding" positions relatively to' the ports in i'id valve seat 58. Any'suttable.yneans may be provided For manually rotating this (llSl\' valve into ditterent positions. those shown In the llrawmgs. for example. being )referred. and com iris'in an n n'i ht s )llb .-dle or stem g'it'i jonrnaled ventrally in a suitqll'lllt bearing-in ,"t e upper easingserlion .52 and ronneet ei W valve whil'e'i'ts upper end is ronneeted \\'i h a laterally projerting handle 57.

|ts .lower end with the For nnmsgof holding this handle and the e. eonneeted' therewith 1n the various flat underside or t'aeeagainst the 'alve plurality of notches Hi), 90, U1 and H2 formed in a quadrant on the outer side of the upper 'asing section.

On its underside or tare this dish. valve 5;) is provided with a main exhaust ravity til extending from its center outwardly and perumnently in conununiaition at its inner end with the main exhaust channel TU, as shown t'orinstanre .in Fig. 3. .\t its outer end the main exhaust 'avity U1, is provided with a reduced extension groove it extending rircumt'erentially relatively to the disk valve 5 1 and opening through the fare on the underside. thereof.

The underside of the disk valve. 55 is also provided with a dmvnwardly opening supply cavity (55 pre'l'e ably of segmental form and arranged on' the opposite side oil the cenler of this valve relatively to the exhaust ravlt-y til. ()ntl' e same side of this valve at a greater distanee. from its renter than the eavity (3?) is a groove 3 whieh also opens ('lownwardly through the fare of this disk valve. At. another point. (:ireuml erentiallv in this valve 55 and approximately at riglit angles to the grooves (33. no is another groove .l-L whit-h opens downwardly through the fare of the valve llxtending through the valve on one sideol' its renter is a small port (it) and on the opposite side of this eenter a large port :39 also extends through this valve .lroni the upper to the lower side of lhe same.

In operating my air-brake system in eon neetion with any of the standard loeomotive air lJlttltt systems. I perform various tunetions with my iinlependent brake valve arro'rding to whether or not the automatie brakeis applied or released. For example. in my air b 'alte system two brake valves are redi iired'on the locomotive one of which is known as the engineers antiomatie brake valve. and the other as the independent brake valve, and should the engil'ieers auto- 'ehamber ii-l and' through the two ports at and till in the rotary valve 55 and through ports llli and ()7 HI the valve seat as into cored passage (38, and thence through open" it'll) ing 69 into chamber 100 and into pipe 5. which leads directly to the brake cylinders 7, 8, 8, on the engine and tender. In this alpplication position of the handle 57 of t e independent brake valved, ports 74 and 75 which control the flow of air from the exhaust port 208 of the triple valve 12 to the control chamber 78 which contains the release piston 79 in the independent brake valve 4, are closed, thereby reventing any action of the automatic re ease valve 82. In this application position of the handle 57 of the independent brake valve 4, reduced main reservoir pressure (which is always in chamber 54 on-top of the, rotary valve 55) will continue to How into the brake cylinders 8, 7 on the engine and tender, until the flow of air is automatically stoppedby the closing of the reducing valve 102 that is located in the pipe 3 which leads from the main reservoir 2 to the engineers independent brake valve 4; Should the pressure from the brake cylinders 7 and 8 leak out of said cylinders or their pipe connections while the handle 57 of the independent brake valve 4 is in its application position, the reducing valve 102 in the main reservoir pipe 3' will automatically continue to supply air through the independent brake valve 4 to the brake cylinders 7. Sunti'lthe pressure is again restored tothe pressure at which the reducing'val-ve 1(22 is set.

When the handle. 57 of the independentbrake-v wlve-4is moved from its first or application position shown in Fig. 6-, to its second or lap position shown in Fig. 7. the. supply ports 59 and 60 through the rotary valve 55 are then disconnected from ports 66 and GI-i-n the rotary seat. which shuts olf any further flow of reduced main reservoir .pressure into the brake cylinders T and 8 on the engine and tender. The amount of anwli-icli- Will-pass throughlthe independent brake valve twhiler in itsapplication posinon. is detverriined'by the len thof time the handle 57 is allowed to remain in that position, buti cannot-exceed'the pressure at Which-the reducingvalve 102- is set. B.y moving the handle}? of the. indepehdent plicationposition and lap position, which manually controls the, flow of alr--fr,om the main reservoir to the both oylll'iders the engi-neer is cn'al rledito mike either a light .or. a

heavy application of the locomotive brakes as occasion may demand, and thus avoid the danger ofshockingthe tram unnecessarily.

- When the-handlem of the independent brake, valve 4 is in -lap position, as shown rotary valve 55" connects ports 73 and 67 brakezvalvel'bllfli and forth between apin Fig. 7. a groove 1n the face of thevalve 4:, to the brake cylinders 7, 8. llul in this 1:2) position of the ini'lependcnt brake valve ports H and 75 in the valve seat 58 .are not in comnumication with each other, neither are ports 70 and 71 in the valve-scat .in communication with each other. In this position of the independent brake valve 4. any air that may be in Jipe 13- leading from the exhaustport 208 oi the triple valve 12- is prevented from getting into the chamber 78 which contains thepiston 79 of the auto-- matic release'valvev 82, and therefore any operation of this release valve 8:2 iH thereby prevented. In this lapposition of the in dependent brake valve l, port 70 in the valve soft 58 is closed, consequently no air is: al owed to escape from the. control chamber ll of the maintaining va ve 23 shown in Fig. 1. Therefore, during the time that the independent brake valve l is in its second or lap position. Fig. 7, any leakage of pressure from the ln'ake cylinders T. S. on'the engine and tender will be automatically overcome by pressure being' supplied to them byway of the maintaining valveQJ-l. which is connected to the brake cylinders by pipes .26 and 5 and by pipes A and 3 to the main reservoir 2. In lap position of the independent brake valve 4-, the large exhaust.

cavity 61 in the face of the rotary valve 55' is blanked onthe valve seat '58, thereby ;-'I-

keeping the ,largeexhaust port through theindependent brake valve closed.

When the ii'ulcpem'lent brakeIvalve-l is in a its third or runnin g position. assho-w-n' in- Fig. 8. the supply ports 59 and (30 are still disconnected from ports 66 and G? in the valve seat. as. and the large exhaust cavity 61 on the face of the rotary valve is still blaukedon the face of the valve seat ob but the groove 6.4 in the face of the-rotary valve now connects ports TOahd 71. in thcvalve seat, so that the air that was previously confined inthe control chamber. l-l; of the main. taining valve is now free to pass out by way of the cored 'passageii to which port 'TPl-in' the valve seat 58 is connected, and

thence througligroove .65 in the. face of rotary valve 55 into port 67 in the valve- 1 -seat 58' into the cored passage GB'urulerthixs valve seat and out through the QPGII-IHg'GQ- into cylinder exhaust chamber 100- and thence through exhaust. port 80 into; the

.h'rakewalvel to the atmosphere. '1

-n ain exhaust channel 76 of. the independent 7 sagzeof air from the control chamber 4: "of:

the maintaining valve 23 totheatmosphere is due to the fact. that when the .handle' 57 I of the independent brake valvel is placed in runniug'position,=as shown-in-Figa8, it

causes the automatic release valve'82toopen" in response to the back flow' of brakcylinderpressure;because of the fact that when a the independent brake vaive 4fand the triple 1 valve 12 are both in runningpositionabrake bmdmeguwmvwkndyasp nes sulgithe lqomntiwe brake should cause the wheels on the locovmxaw is Il'IQtiVO'tPbBCOIHG locked, the engingehcan almost- 1 nst'a'nfl release the locbmofi'ivti brakes wlthout (llshn'bing thetrain brakes,

.by Simply placingfhe handle 57 of my inclepg clentvbgnke valve 4 .in its quick release 70 posl'tlon, whlch opens the brake yljmlers on the, engine and tender directly t0 the atmosphorila v way of ifhe largepa-vity 61 ll'll'llc fa'ee 0 vtho,rotarfv valvejfi and-the main exhaust; channel 76:18 )'re\ 'io'usl clhscrihrl. By reason of tl refact that th' triple 'valve 12 in my airjbraka system is-n9tqon 1 1ebfgd directly to the b ake cylinders'f} Sam: is the' '15 the tr-iple a-lve 12 and the ind pe'ndht hrafkovalye. 4 togetherby direct) ,pl'p'e nhow much and how last the pressure is being! huilt up in the brake cylindeis'7, S, on the locomotive.

Fil tlrili \"'leaving the handle 57 of my independent hrake valve l in itslap position. Fig. T. after the brakes have heen applieda either with the engineens automatic hrake valve 18 or with my independent ln'alte valve l. then should any pressure leak out from the hrake evliiulers' T 8. the pressure in the hrakeevlinders will heautoniatr rally restored hy the operationof my maintainine valve 2 1. l*igs. l and 2. as follows:

When compressed air enters hrake eylim der pipe Fig. 1. it passes through pipe it: into ehamher 43. Fig. L). of my maintaining valve 2 3. and thence through port +6 past the cheek valve lh into chamber H on top of the diaphragm l2 and into pipe itffito the valve seatfih oi the imlepelulent-hrake valve l. Consequently.shouldhrakeeylinderpressure. which is always in chanlher 43 of my maintaining; valve ,l whenever the hra kes are set. he reduced on account of leakage. from thehrakeeylindersY RJ or their pipe, connections. this reduction of brake cylinder pressure would cause the. )ressure which 'eonlined above the diaphragm 4'2 to force the diaphragm stem 23 down and engage the stem 37 ot siipply valve and force it from its seat. thereby openingsu ply port 38 which admits main reservoir pressure, which is always in passage 35.

voir pipes .Z-l and E at pipe connection 36.

'lherer'ore. when the sapply valve 38 is off its xand tender. and the air will continue to flow handle 57 o r is Ill lap pos 'liou. mymaintaining valve will aulonnitieally rout n ne to overcome seat. main reservoir pressure is tree-to pass through supply .port 37 inloehanrher l3 nd through opening-l5 Into pipes 36. 5 and (i. into tlllglll'tllfl evhnders R. on the engine t'ro'm passage 35 into chamber 13 until the pressure in ehamher. i3 -e1 ualizes with the pressure in eha'mher H when the (ha phragm stem 2?? will assume its uorrnal'position. as shown in Fig.2. and thereby permitsupply valve It} to resent and (lose supply port- 3 and stdp any further [low of pressure from passage 3:3 into ehamher 4-1}. .\s longas the handle I)? of the iiule aanlenthrake valve 4 is held in its lap position. there ean he no eseapeol pressure from ehamlier -H'in niy maintaining dve;eonseq-i'lently. while the kage of pressure from the lira'lte cylinders IH' as long as there is'any pressure in tho- -niail'lhreservmI 2.

When the liaiulle ffi o'l' my. ihdela'mlent hralce i'ali e' l isplaeed in i uielt' release p0?" sition; as shown in J Fig, l). extension grooveiii in the face of the rotary valve 5:") l igffi' eonnert' with maintaining valve port- 70 inn that passage being always emnieeted with the mam reser- 35;

the valve seat 58. therein; permitting pressure that was confined in eha nlwr H of the maintaining valve. 23 to exhaust to the atmosphere by way of groove GQ, large exhaust.

eavity (i1 and the main exhaust eha-nnel 76,-. which prevents ny further action on the part of the maintaining valve 23 until the hieomotive hrakes have again been applied.

I claim as my invention:

l. .\n air brake system for loe-on'iotivcs oaotlieiself-propelled vehicles. comprising means t'or ,!1ppl \-'ing compressed air, a main reservoir. an engineerPs automatic, brake valve. a triple alve. an auxiliary reservoir, a brake eylinder. an indepemlent brake valve adapted by manual control of its ports efi'eet passages for the flow ofemn 'n'essed air to' parts of said system and to the atnmspl ere and to retain said compressediair within said system parts. connections be tween said main reservoir. and brake cyl' inder. having within said connections a pressure reducing valve, and connections between said independent brake valve and said brake cylinder a nrl the brake cylinder supply port of said triple valve, said independent hrake. valve havingtwo separate exhaust outlets arranged to permit of a nor nial exhaust of the brake cylinder pressure and a quick exhaust of brake eyliinler pres-.

sure.

2. An air hra kesystem for locmnotives or other selt'propelled" veh cles. comprising means for su )pl 'ing compressed air, a main reservoir. an engineers automatic brake valve. a triple valve. an auxiliary reservoir, a brake c;\;'linder. an imlepemlent brake valve eet pa igres t'or the flow of compressed air to parts of said system and to' the atmosphere and to. retain said eompressed air within said system parts, piping connections ljietween said hrake valves. main reservoir, brake cylinder. auxiliary reservoir, and

agapted by manual control (if it's portsto" triple valve. having withinsaid connections a pressure reducing valve. and tuhulaeconneetions' between said independent bra-lte valve andsaid brake. cylinder and sa d 'triple valve. saidtulmlar conneetions=hetweensaid iiulep end'ent brake valve audi s-aid.triple valve l10llij '50 arranged thatwvl en an autom'atie application oi thehrakes is iuadm'aux" ilia'ry reservoir prtisslrre mustfpass from the triple valve to the hral'e. cylinder by way of tuhular connections l eat iirg tronr said triple valve'to' slwindependenti brake valve.

31 An air lnalte systenr l or ltazo notives or other self- )ropel-led vehicles. comprising means for .su )'])l i ng eon-ipressed air. a main reservoir. ran: engineers, antomatio bra (e, -valve;a .l riple valve; anauxil a" reservoir.

in lilnlit aylinder. an ii-uleraaulea lllilltQl'tl-lfifi! adapted hy manualcontrol Q'l' tsports to iefiect passages for theflow-ot compressed air v r ts o f said sytem and to the atmgsphgtfe m1 lilo etq in Sa l (1 ponipresc li air wi thipffihiid system parts. P1131112 c opnechpng be m' uxl brnke valves. mam re servo1r,,bra

5 index, aux-ilmry reservoir, zm(l-trlpl. ysilvgi," ilm xla g vifhin said connections a pressure. 135g, valvo. am] tubular cQn necti0 Iis' b'e- I said ind'q mmlentbpuk'e valyg indflsaid kg Gl'limlv r aml said tripldyal've, Saidiii-f wD'QIFtin aid soqLa chamber. n [)nfsSfiQi; gmian mlcfpm't lcadmg to Saul. clm lljlll lxa reljea'se 5 .1.); to? arrzu ged m said chamber, an exhaust;

-riple valve. to a-ip'nrtin the 'val 'e seap' of said imlo'polidont .hrake valve and Ithgnge tlai'oaigll-said paxsage and inlet pm t info said' a "elm ml 01" in. Qmrl liKlUIM-ZH (lp'lnr brlakehvalye, so 30 t1 valvt'w'a triple v'alve. m auxiliary. reserygir, a

valv

ingllddmpressd ninafiain ingmnlve mechanisv 'penglefi t brake :yal've other sel-'pr0pellecl, vehicles means for supplying cpmpressed air to-sgu 7 65g ntlmi: olf-p'l opfellm vehicles, W. comprising means for silpplylng compressed ain'tqj -said-j, SYfi Q 'H-Q main self r, 'B iefi 8 w 0. m'atic bnn ke, valve; a triple-.vnlv, an, milliliau'y reservoir. :1 bralm cylinder, and, an in? dependent brak wilye liming within ,fihg

inglcr pressure that reaches saidrolea'se valvev other fielf -propp ad follicles, c'ompn smg Q0 55 s vstqm a plain. IOSGI'YOll. anongineobs autoclose a: porn} 1 eml mg fi'om cpntlg and in One-position jtpqpgnaid. mpinfiajging lvemo t0 i n tll q i ng iothew or --con,llg }.whiply].commumga w th a mtainin 

